DE2939280A1 - Fuel injection nozzle for diesel engine - has thin sleeve projecting into cylinder to prevent coking of injection nozzle by different thermal expansion - Google Patents
Fuel injection nozzle for diesel engine - has thin sleeve projecting into cylinder to prevent coking of injection nozzle by different thermal expansionInfo
- Publication number
- DE2939280A1 DE2939280A1 DE19792939280 DE2939280A DE2939280A1 DE 2939280 A1 DE2939280 A1 DE 2939280A1 DE 19792939280 DE19792939280 DE 19792939280 DE 2939280 A DE2939280 A DE 2939280A DE 2939280 A1 DE2939280 A1 DE 2939280A1
- Authority
- DE
- Germany
- Prior art keywords
- injection nozzle
- cylinder
- nozzle
- valve seat
- thermal expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000002347 injection Methods 0.000 title claims abstract description 11
- 239000007924 injection Substances 0.000 title claims abstract description 11
- 239000000446 fuel Substances 0.000 title abstract description 7
- 238000004939 coking Methods 0.000 title description 6
- 239000007921 spray Substances 0.000 claims description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000004071 soot Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/06—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves being furnished at seated ends with pintle or plug shaped extensions
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Zapfendüse für Dieselmotore Stand der Technik Die Verkokung der Zumeßstelle, d.h. der Dosierquerschnitte und strahlenformenden Bereiche, gehört zu den häufigsten Funktionsstörungen bei Einspritzdüsen.Spigot nozzle for diesel engines State of the art The coking of the metering point, i.e. the metering cross-sections and beam-shaping areas are among the most common Injector malfunctions.
Die Verkokung bilden aus Primär-Rußteilchen und übrigen Kraftstoffbestandteilen zusammengebackene Agglomerate in der Größenordnung von zehn bis fünfzig Angström. Die derzeit verwendeten Formen der Zumeßstelle verhindern zumeist eine gewisse Selbstreinigung und begünstigen eher die Verkokung, was stärkere Verbrennungsgeräusche im Leerlauf und bei Teillast, Blaurauch und erhöhte Emission von Kolhlenwasserstoff im Leerlauf zur Folge hat.The coking is formed from primary soot particles and other fuel components caked agglomerates on the order of ten to fifty angstroms. The currently used forms of metering point mostly prevent a certain amount of self-cleaning and tend to favor coking, resulting in stronger combustion noises when idling and at part load, blue smoke and increased emissions of hydrocarbon when idling has the consequence.
Aufgabe der Erfindung Der Erfindung liegt die Aufgabe zugrunde, das im Stand der Technik dargelegte Problem der Verkokung der Zapfendüse für Dieselmotore fertigungstechnisch einfach und wirkungsvoll zu lösen.OBJECT OF THE INVENTION The invention is based on the object that Problem presented in the prior art of coking of the nozzle nozzle for diesel engines easy and effective to solve in terms of production technology.
Vorteile der Erfindung Ausgehend von einer Zapfendüse für Dieselmotore mit einem Düsenkörper, der einen Ventilsitz und ein Spritzloch hat, und mit einer Düsennadel, deren Ventilkegel mit dem Ventilsitz und deren Spritzzapfen mit dem Spritzloch zusammenwirkt, wird die Erfindungsaufgabe dadurch gelöst, daß entweder eine dünnwandige Hülse von Düsenkörper absteht, deren Bohrung koaxial zum Spritzloch angeordnet ist, oder dadurch, daß eine Ringnut in Spritzloch angeordnet ist. Der erstgenannten erfindungsgemäßen Lösung liegt der Gedanke zugrunde, die unterschiedliche thermische Ausdehnung der Stahlhülse und der rußhaltigen Verkokung zu nutzen. Dadurch, daß die in den Verbrennungsraum ragende Hülse zum einen von den Verbrennungsgasen stark aufgeheizt und zum andern vom einspritzenden Kraftstoff abgekühlt wird, können sich die Rußteilchen an der Düse nicht festsetzen.Advantages of the Invention Based on a spigot nozzle for diesel engines with a nozzle body, which has a valve seat and a spray hole, and with a Nozzle needle, its valve cone with the valve seat and its spray pin with the Injection hole cooperates, the object of the invention is achieved in that either a thin-walled sleeve protrudes from the nozzle body, the bore of which is coaxial with the spray hole is arranged, or in that an annular groove is arranged in the spray hole. Of the The first-mentioned solution according to the invention is based on the idea that the different to use thermal expansion of the steel sleeve and the soot-containing coking. Through this, that the sleeve protruding into the combustion chamber on the one hand from the combustion gases is strongly heated and on the other hand cooled by the injecting fuel, can the soot particles do not adhere to the nozzle.
Der zweiten erfindungsgemäßen Lösung liegt der Gedanke zugrunde, den durch den einströmenden Kraftstoff hervorgerufene Unterdruck in der Ringnut dadurch zu nutzen, daß der Kraftstoff am Spritzloch zum Anliegen kommt und sich somit an diesem die Rußteilchen nicht festsetzen können.The second solution according to the invention is based on the idea that negative pressure in the annular groove caused by the inflowing fuel to use that the fuel comes to rest on the spray hole and thus to itself this the soot particles can not settle.
Zeichnung Zwei Xusführungsbeispiele der Erfindung sind in der Zeichnung- dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen jeweils in abschnittsweise: Axialschnitt und vergrößertem Maßstab Fig. 1 die Zapfendüse mit einer Hülse im Spritzlochbereich; und Fig. 2 die Zapfendüse mit einer Ringnut im Spritzloch.Drawing Two examples of the invention are shown in the drawing and explained in more detail in the following description. It show each in sections: axial section and enlarged scale Fig. 1 die Spigot nozzle with a sleeve in the spray hole area; and FIG. 2 the spigot nozzle with an annular groove in the spray hole.
Beschreibung der Ausführungsbeispiele Eine im wesentlichen rotationssymmetrische Zapfendüse besteht aus einem metallenen Düsenkörper 10 und einer darin einen Hub ausführenden, metallenen Düsennadel 11.Description of the exemplary embodiments An essentially rotationally symmetrical one Spigot nozzle consists of a metal nozzle body 10 and a hub therein executing, metal nozzle needle 11.
Diese ist mehrfach abgesetzt zu einem Ventilkegel 12 und einem Spritzzapfen 13, der teilweise in den Verbrennungsraum 14 des nicht näher dargestellten Dieselmotores ragt. Der Düsenkörper 10 hat einen mit einer Zuleitung 18 verbundenen Druckraum 15, einen mit dem VentiJkegel 12 zusammenwirkenden Ventilsitz 16 und ein Spritzlocn 17, in welchem der Spritzzapfen 13 mit Spiel geführt ist. Vom Düsenkörper 10 steht einstückig eine dünnwandige Hülse 19 in den Brennraum 14 ab, deren Bohrung identisch mit dem Spritzloch 17 des Düsenkörpers 10 ist.This is set off several times to a valve cone 12 and a spray spigot 13, which is partially in the combustion chamber 14 of the diesel engine, not shown in detail protrudes. The nozzle body 10 has a pressure chamber connected to a supply line 18 15, a valve seat 16 cooperating with the valve cone 12 and an injection block 17, in which the spray pin 13 is guided with play. From the nozzle body 10 stands integrally a thin-walled sleeve 19 into the combustion chamber 14, the bore of which is identical with the spray hole 17 of the nozzle body 10 is.
Das zweite Ausführungsbeispiel in Fig. 2 verwendet für gleiche oder ähnliche Teile desselben Bezugszeichen wie in Fig. 1. Im Spritzloch 17 ist eine Ringnut 21 mit quadratischem Querschnitt ausgespart; es ist auch jede andere Querschnittsform möglich. Die vom Ventilsitz 16 und dem Spritzloch 17 gebildete Einlaufkante 23 ist stark abgerundet, damit der einspritzende Kraftstoff sich vom Spritzloch 17 nicht ablöst.The second embodiment in Fig. 2 used for the same or Similar parts have the same reference numerals as in Fig. 1. In the injection hole 17 is a Annular groove 21 recessed with a square cross-section; it is also any other cross-sectional shape possible. The inlet edge 23 formed by the valve seat 16 and the injection hole 17 is strongly rounded so that the injecting fuel does not move away from the injection hole 17 replaces.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792939280 DE2939280A1 (en) | 1979-09-28 | 1979-09-28 | Fuel injection nozzle for diesel engine - has thin sleeve projecting into cylinder to prevent coking of injection nozzle by different thermal expansion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792939280 DE2939280A1 (en) | 1979-09-28 | 1979-09-28 | Fuel injection nozzle for diesel engine - has thin sleeve projecting into cylinder to prevent coking of injection nozzle by different thermal expansion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2939280A1 true DE2939280A1 (en) | 1981-04-16 |
Family
ID=6082080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19792939280 Withdrawn DE2939280A1 (en) | 1979-09-28 | 1979-09-28 | Fuel injection nozzle for diesel engine - has thin sleeve projecting into cylinder to prevent coking of injection nozzle by different thermal expansion |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2939280A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3233975C1 (en) * | 1982-09-14 | 1983-12-22 | Daimler-Benz Ag, 7000 Stuttgart | Throttle pin nozzle for fuel injection in an internal combustion engine into a secondary combustion chamber which is connected to a main combustion chamber via at least one firing channel |
| WO2003027488A1 (en) * | 2001-08-29 | 2003-04-03 | Robert Bosch Gmbh | Fuel injection valve |
| DE19802883B4 (en) * | 1998-01-27 | 2008-02-28 | Brand, Wolfgang | injection |
| US11846026B2 (en) | 2021-01-15 | 2023-12-19 | General Electric Company | Coated article for hot hydrocarbon fluid and method of preventing fuel thermal degradation deposits |
-
1979
- 1979-09-28 DE DE19792939280 patent/DE2939280A1/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3233975C1 (en) * | 1982-09-14 | 1983-12-22 | Daimler-Benz Ag, 7000 Stuttgart | Throttle pin nozzle for fuel injection in an internal combustion engine into a secondary combustion chamber which is connected to a main combustion chamber via at least one firing channel |
| DE19802883B4 (en) * | 1998-01-27 | 2008-02-28 | Brand, Wolfgang | injection |
| WO2003027488A1 (en) * | 2001-08-29 | 2003-04-03 | Robert Bosch Gmbh | Fuel injection valve |
| US7021564B2 (en) | 2001-08-29 | 2006-04-04 | Robert Bosch Gmbh | Fuel injection valve |
| US11846026B2 (en) | 2021-01-15 | 2023-12-19 | General Electric Company | Coated article for hot hydrocarbon fluid and method of preventing fuel thermal degradation deposits |
| US12188128B2 (en) | 2021-01-15 | 2025-01-07 | General Electric Company | Coated article for hot hydrocarbon fluid and method of preventing fuel thermal degradation deposits |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8139 | Disposal/non-payment of the annual fee |